20521532 has 24 divisors (see below), whose sum is σ = 37084656. Its totient is φ = 9929088.

The previous prime is 20521519. The next prime is 20521561. The reversal of 20521532 is 23512502.

It is a super-2 number, since 2×20521532² = 842266551254048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46103 + ... + 46545.

It is an arithmetic number, because the mean of its divisors is an integer number (1545194).

Almost surely, 2^20521532 is an apocalyptic number.

It is an amenable number.

20521532 is a deficient number, since it is larger than the sum of its proper divisors (16563124).

20521532 is a wasteful number, since it uses less digits than its factorization.

20521532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20521532 is about 4530.0697566373. The cubic root of 20521532 is about 273.7809711767.

The spelling of 20521532 in words is "twenty million, five hundred twenty-one thousand, five hundred thirty-two".